package com.hengpeng.common.web.core;

import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.io.OutputStream;
import java.util.HashMap;
import java.util.Map;

import javax.imageio.ImageIO;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.common.BitMatrix;

/**
 * <pre>
 * 生成二维码
 * </pre>
 * @author chenhui
 * @version 1.0, 2014-5-6
 */
public class QRCodeImageWriter
{
	private static final int BLACK = 0xFF000000;

	private static final int WHITE = 0xFFFFFFFF;

	private static BufferedImage toBufferedImage(BitMatrix matrix)
	{
		int width = matrix.getWidth();
		int height = matrix.getHeight();
		BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
		for (int x = 0; x < width; x++)
		{
			for (int y = 0; y < height; y++)
			{
				image.setRGB(x, y, matrix.get(x, y) ? BLACK : WHITE);
			}
		}
		return image;
	}

	public static void writeToFile(BitMatrix matrix, String format, File file) throws IOException
	{
		BufferedImage image = toBufferedImage(matrix);
		if (!ImageIO.write(image, format, file))
		{
			throw new IOException("Could not write an image of format " + format + " to " + file);
		}
	}

	public static void writeToStream(BitMatrix matrix, String format, OutputStream stream) throws IOException
	{
		BufferedImage image = toBufferedImage(matrix);
		if (!ImageIO.write(image, format, stream))
		{
			throw new IOException("Could not write an image of format " + format);
		}
	}

	public static void main(String[] args)
	{
		try
		{
			String content = "http://www.tvcbao.com/apps/tvcbao.apk";
			String path = "E:\\";
			MultiFormatWriter multiFormatWriter = new MultiFormatWriter();

			Map<EncodeHintType, String> hints = new HashMap<EncodeHintType, String>();
			hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
			BitMatrix bitMatrix = multiFormatWriter.encode(content, BarcodeFormat.QR_CODE, 500, 500, null);

			QRCodeImageWriter.writeToFile(bitMatrix, "jpg", new File(path, "二维码.jpg"));
		}
		catch (Exception e)
		{
			e.printStackTrace();
		}
	}
}
